Method of making inking pads



Sept. 13, 1927;

' 1,642,199 P. A. GOLLNICK ET AL- METHOD OF MAKING INKING PADS Filed Jan. 24. 1927 Patented Sept. 13, 1927.

UNITED STATES 1,642,199 PATENT OFFICE.

PAUL A. GoLLNIoK ANDYJOHN JOSEPH TOOLAN, 0F GHIQAGO, ILLINOIS, ASSIGNORS- TO. SPIEGEL, MAY, s'rnnn COMPANY, on CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

METHOD or MAKING INKING ans.

Applicationfiled January 24, 1927. Serial No. 163,171.

This invention relates to methods of maktough enough to withstand the wear to which it is subjected. A common composition for this purpose consists of glue or gelatine, water, linseed oil, molasses or sugar, calcium chloride, rosin, and sulphuric acid. These ingredients are mixed in liquid form and then permitted toharden or set in the mold. In order to obtain the necessary coherence of these different ,ingredients in the making of an inking roller, it has been customary'to rotate the cylindrical mold at high speed so as to subject the material to centrifugal action While it is setting. 1

Inking pads generally comprise a metal base having a facing of elastic material. These facings or pads'of block or stripform have been molded usually in a stationary form, and for this reason they have not been made of the aforementioned ingredients which require "a continuous centrifugal action while the" composition is setting.

The main objects of this invention are to provide an improved method of making inking pads; to provide an improved method r of applying an elastic facing to the base member of an inking pad; and to provide an improved method of applying an elastic composition material to a metal base strip for making an inking pad adapted for use in addressing machines.

An illustrative embodiment of an apparatus adapted for carrying out this improved process is shown in the accompanying drawings, wherein,-

Fig. 1 is a longitudinally section of a centrifugal device wherein a plurality of base segments are arranged to form a cylindrical mold for receiving the elastic facing, part of the facing being broken away for the sake 0 of clearness.

Fig. 2 is a transverse section taken on the line 22 of Fig. 1.

Fig. 3 is a perspective of one of the finished pads,

The inking pads herein shown, which are adapted to be made by this improved method,comprise base segments 1, preferably. made of suitable metal, to which are supplied 'facings of elastic material 2. The lateral edges 3 of the segments 1 are slightly convergent so as to permit a plurality of the segments to be arranged in cylindrical form to provide a shell or mold, as shown in Figs. 1 and 2. The outer faces 4 and the inner faces 5 of the pad segments herein shown are slightly curved so as to present cylindrical contours when the segments are assembled.

Formed in the inner faces 5 of the segments, are undercut" recesses 6 for receiving portions of the facing material which anchor the facings to the base parts.

In the form shown, the centrifugal apparat'us for applying the elastic facing to the base segments of the pads comprises a drum 7 having a pair of caps 8 in the ends thereof, which are adapted to be supported in a suitable machine (not shown) .for rotating the drum at high speed. v The caps 8 are provided with annular seats 9 for receiving the ends of the drum 7, and axial bores 10. i i

The caps" 8 are spaced apart so as to permit the base segmentsl to be arranged in cylindrical form" within the drum 7 between theinner ends of the caps. wardly through the bore 10 of one of the caps 8, is a spout 11, through which the facing material is injected into the mold in liquid form.

To assemble the mold, the base segments 1 are placed within the drum 7 in the manner shown in Figs. 1 and 2 and a wedge 12 is then driven between the opposed edges of two adjacent segments for securing the segments of the mold against creeping. "The drum is then rotated at high speed While the facing material flows into the mold through the spout 11. The liquid drops from the spout andspreads over the entire inner surface of the mold, entering the undercut recesses 6' to form the anchoring portions. When material of sufficient quantity to form a facing of the desired thickness has'been admitted to the mold, the flow through the spout 11 is stopped and the drum is permitted to continue its rotation until the facing material has Set.

Extending in-- The mold is then removed from the drum 7 and, .hy means of a knife or other suitable instrument, the facing material is' then divided along lines coincident with the abutting edges of the base segments. The facing material "2 of each segii ient may then be trimmed to produce a pad of the desired shape.

Although but one specific method of making inking pads has been herein described, it will be understood that certain steps thereof may be aried without departing from the spirit of this invention.-

W c aim:

l. The method of making inking pads which consists in arranging a plurality of independent base segments to form a shell, applying facing material to the shell, and then dividing said facing material along adjacent edges of said base segments.

2. The method of making inking pads whichconsists in-arranging a plurality'of independent base segments to form a cylindrical shell mold, applying a facing material to the shell, and then dividing said "facing material along lines coincident With the adjacent edges of said base segments.

" 3. Themethod of ma king inking pads which consists in lining a cylindrical mold with a facing material, and then dividing said facing material along lines extending axially of the mold.

4. The method of making inking pads which consists in lining cylindrical mold with a facing material, and then dividing said facing material and mold along lines extending axially ofthe mold.

The methodof making inking pads which consists in arranging a plurality of independent base segments to form a shell, applying a'faciiig material to the inner wall arena shell by centrifugal action to produce a lining, and then dividing said lining along the adjacent edges ofsaid segments.

)6. The method of making inking pads which consists in arranging a plurality of independent base segments to. form apylindrical shell, applying a facing material to the inner wall -of said shell, and then di- Niding said facing material along lines extending axially 6f the shell.

7. The method of making inking pads which consists in arranging a plurality of independent base segmentsin a-buttingfrela- .tion to form a cylindrical shell, applying a facing material by centrifugal action to the inner wall of said shell to produce a lining,

and then dividing said lining along lines 00- incident with the abutting edges .ofsaid base segments.

8. The method of making 'nking pads which consists in forming a shell mold with undercut recesses in the inner all thereof, applying a facing material to Said inner wall by centrifugal action to produce alining having anchoring portions in said re- .cesses, and then dividing said lining and mold along lines extending longitudinally thereof.

9. The method of producing inking pads which consists in forming a cylindrical shell mold of a plurality of independent basesegme i hav ng un cut reces es in the aces er pp y n a. fa ng m rial y 'ce triifugal action to the inner wall ofthe mold to produce a lining having anchoring porti ns n sai e e s, and t n d id n Said lining along. lines coincident with the adjacen dses o Sa b as gm n s- Signedat Chicago this 2 0t day of Jany, 927.

PAULA- GOLLNIGK- JOHN JOSEPH TQQL N. 

